Total Charging Time Calculator

✖Emitter charging time is defined as drift in the motion of the charged particles induced by a field when you forward bias the emitter junction you get a large diffusion.ⓘ Emitter Charging Time [τ_e]			+10% -10%
✖Collector charging time refers to the time taken for the minority carriers in the base region of a BJT to be swept out of the collector region after the transistor is turned off.ⓘ Collector Charging Time [τ_c]			+10% -10%

✖The Total Charging Time in a BJT is the duration for both emitter and collector currents to reach a substantial portion of their final values upon transistor activation.ⓘ Total Charging Time [τ_ct]

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Formula

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Total Charging Time

Formula

`"τ"_{"ct"} = "τ"_{"e"}+"τ"_{"c"}`

Example

`"5279.4μs"="5273μs"+"6.4μs"`

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Total Charging Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Total Charging Time = Emitter Charging Time+Collector Charging Time
τ_ct = τ_e+τ_c
This formula uses 3 Variables

Variables Used

Total Charging Time - (Measured in Second) - The Total Charging Time in a BJT is the duration for both emitter and collector currents to reach a substantial portion of their final values upon transistor activation.
Emitter Charging Time - (Measured in Second) - Emitter charging time is defined as drift in the motion of the charged particles induced by a field when you forward bias the emitter junction you get a large diffusion.
Collector Charging Time - (Measured in Second) - Collector charging time refers to the time taken for the minority carriers in the base region of a BJT to be swept out of the collector region after the transistor is turned off.

STEP 1: Convert Input(s) to Base Unit

Emitter Charging Time: 5273 Microsecond --> 0.005273 Second (Check conversion here)
Collector Charging Time: 6.4 Microsecond --> 6.4E-06 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

τ_ct = τ_e+τ_c --> 0.005273+6.4E-06

Evaluating ... ...

τ_ct = 0.0052794

STEP 3: Convert Result to Output's Unit

0.0052794 Second -->5279.4 Microsecond (Check conversion here)

FINAL ANSWER

5279.4 Microsecond <-- Total Charging Time

(Calculation completed in 00.004 seconds)

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Created by Gowthaman N

Vellore Institute of Technology (VIT University), Chennai

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Verified by Ritwik Tripathi

Vellore Institute of Technology (VIT Vellore), Vellore

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< 15 BJT Microwave Devices Calculators

Maximum Frequency of Oscillations

Go Maximum Frequency of Oscillations = sqrt(Common Emitter Short Circuit Gain Frequency/(8*pi*Base Resistance*Collector Base Capacitance))

Emitter Base Charging Time

Go Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time)

Base Collector Delay Time

Go Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time)

Collector Charging Time

Go Collector Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Base Transit Time+Emitter Charging Time)

Base Transit Time

Go Base Transit Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Emitter Charging Time)

Emitter to Collector Delay Time

Go Emitter Collector Delay Time = Base Collector Delay Time+Collector Charging Time+Base Transit Time+Emitter Charging Time

Collector Base Capacitance

Go Collector Base Capacitance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Base Resistance)

Base Resistance

Go Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance)

Avalanche Multiplication Factor

Go Avalanche Multiplication Factor = 1/(1-(Applied Voltage/Avalanche Breakdown Voltage)^Doping Numerical Factor)

Saturation Drift Velocity

Go Saturated Drift Velocity in BJT = Emitter to Collector Distance/Average Time to Traverse Emitter to Collector

Emitter to Collector Distance

Go Emitter to Collector Distance = Maximum Applied Voltage in BJT/Maximum Electric Field in BJT

Total Charging Time

Go Total Charging Time = Emitter Charging Time+Collector Charging Time

Cut-off Frequency of Microwave

Go Cut-off Frequency in BJT = 1/(2*pi*Emitter Collector Delay Time)

Total Transit Time

Go Total Transit Time = Base Transit Time+Collector Depletion Region

Hole Current of Emitter

Go Hole Current of Emitter = Base Current+Collector Current

Total Charging Time Formula

Total Charging Time = Emitter Charging Time+Collector Charging Time
τ_ct = τ_e+τ_c

How can you explain the concept of Total Charging Time in a BJT?

The Total Charging Time in a BJT is the sum of Emitter Charging Time and Collector Charging Time. It represents the duration for both emitter and collector currents to approach significant fractions of their final values during transistor activation, crucial for understanding the transistor's dynamic behavior.

How to Calculate Total Charging Time?

Total Charging Time calculator uses Total Charging Time = Emitter Charging Time+Collector Charging Time to calculate the Total Charging Time, The Total Charging Time in a BJT is the duration for both emitter and collector currents to reach a substantial portion of their final values upon transistor activation. Total Charging Time is denoted by τ_ct symbol.

How to calculate Total Charging Time using this online calculator? To use this online calculator for Total Charging Time, enter Emitter Charging Time (τ_e) & Collector Charging Time (τ_c) and hit the calculate button. Here is how the Total Charging Time calculation can be explained with given input values -> 5.3E+9 = 0.005273+6.4E-06.

FAQ

What is Total Charging Time?

The Total Charging Time in a BJT is the duration for both emitter and collector currents to reach a substantial portion of their final values upon transistor activation and is represented as τ_ct = τ_e+τ_c or Total Charging Time = Emitter Charging Time+Collector Charging Time. Emitter charging time is defined as drift in the motion of the charged particles induced by a field when you forward bias the emitter junction you get a large diffusion & Collector charging time refers to the time taken for the minority carriers in the base region of a BJT to be swept out of the collector region after the transistor is turned off.

How to calculate Total Charging Time?

The Total Charging Time in a BJT is the duration for both emitter and collector currents to reach a substantial portion of their final values upon transistor activation is calculated using Total Charging Time = Emitter Charging Time+Collector Charging Time. To calculate Total Charging Time, you need Emitter Charging Time (τ_e) & Collector Charging Time (τ_c). With our tool, you need to enter the respective value for Emitter Charging Time & Collector Charging Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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